Comparison of Canon EF-S 10-22mm f/3.5-4.5 USM and Tamron SP AF 11-18mm f/4.5-5.6 Di II LD Aspherical IF

Attribute	Canon EF-S 10-22mm f/3.5-4.5 USM ×	Tamron SP AF 11-18mm f/4.5-5.6 Di II LD Aspherical IF ×
Filter Size (mm)	77	77
Notes	EF-S lens mount, exclusively for EOS 20D, Digital Rebel, and newer bodies with APS-C sensors.	Available mounts: Canon, Minolta, Nikon; Includes petal type lens hood.
Closest Focus (m)	0.24	0.25
Magnification Ratio (x)	0.17	0.13
Type	Wide Zoom	Wide Zoom
Length (mm)	90	78.6
APS Equivalent	16 - 35mm	1.5x: 16.5 - 27mm; 1.6x: 17.6 - 28.8mm
Zoom System	Rotary	Rotary, telescoping
Image Circle	APS-C	Image Circle
Focal Length (mm)	10.00 - 22.00	11.00 - 18.00
Brand	Canon	Tamron
Name	Canon EF-S 10-22mm f/3.5-4.5 USM	Tamron SP AF 11-18mm f/4.5-5.6 Di II LD Aspherical IF
Weight (g)	385	355
Aperture (f)	3.50 - 22.00	4.50 - 29.00
Diaphragm Blades	6	7
Diagonal Angle of View (degree)	63.50 - 107.50	75.00 - 103.00
Lens Construction	13 elements in 10 groups, including 3 aspherical and 1 S-UD elements	15 elements in 12 groups, including aspherical and low dispersion elements
Diameter (mm)	83	82.2
Focus Details	Inner focusing; full-time manual focus and USM	Internal